>something that was never a serious claim

And yet was claimed again and again by e.g. pediatrics societies in Switzerland and France to justify ending every restrictions (thereby mass contaminating children before they could be vaccinated, and contributing to more spread and more mutations of the virus)

I think they mean serious in scientific terms, not in policy making.

I'm not arguing the claim. I'm asking a person to read was said, and respond to it, instead of to something that was not said.